[doc] Fix some typos in our document export_results.rst

[Rullec]

Fix some typos in the doc export_results.rst as @archibate mentioned.

[archibate]

Thanks, could you also fix the ones in offset.rst, where AssertionError should be TypeError?

[archibate]

Could you also fix the one in examples/export_videos.py?

[Rullec]

where AssertionError should be TypeError?

Umm, It seems just now I have responsed that problem here

IMO it's not a typo.

For example, If I say

import taichi as ti

ti.init()
c = ti.Matrix(2, 1, dt=ti.f32, shape=None, offset=(32,))             # AssertionError

then

[Taichi] mode=development
[Taichi] preparing sandbox at /tmp/taichi-60ypp77c
[Taichi] <dev mode>, supported archs: [cpu, cuda, opengl], commit 626afc81, python 3.6.10
Traceback (most recent call last):
  File "main.py", line 4, in <module>
    c = ti.Matrix(2, 1, dt=ti.f32, shape=None, offset=(32,))             # AssertionError
  File "/home/xudong/Projects/taichi/python/taichi/lang/matrix.py", line 127, in __init__
    assert offset is None, f"shape cannot be None when offset is being set"
AssertionError: shape cannot be None when offset is being set

It is AssertionError indeed. So the doc is correct, it matches the behavior.

Do you mean that TypeError is better than AssertionError

[codecov]

Codecov Report

Merging #1312 into master will increase coverage by 0.32%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1312      +/-   ##
==========================================
+ Coverage   66.36%   66.68%   +0.32%     
==========================================
  Files          36       36              
  Lines        5075     5094      +19     
  Branches      933      931       -2     
==========================================
+ Hits         3368     3397      +29     
+ Misses       1549     1539      -10     
  Partials      158      158              

Impacted Files	Coverage Δ
python/taichi/lang/impl.py	90.06% <0.00%> (-0.14%)	⬇️
python/taichi/lang/__init__.py	75.35% <0.00%> (+0.35%)	⬆️
python/taichi/lang/matrix.py	90.67% <0.00%> (+0.50%)	⬆️
python/taichi/lang/expr.py	89.75% <0.00%> (+1.69%)	⬆️
python/taichi/lang/snode.py	86.02% <0.00%> (+8.68%)	⬆️

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[Rullec]

Thank @archibate for pointing out a typo in offset.rst, It has been fixed now.

[archibate]

Thx!